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An In Vitro Evaluation of a Novel Design Z Plate for Fixation of Mandibular Symphysis and Parasymphysis Fractures-A
Prajwalit Prakash Kende1, Maroti Wadewale1, Suleka Ranganath1
1Department of Oral and Maxillofacial Surgery, Government Dental College and Hospital, Mumbai, 400001 India.
Aim:
Surgical management of mandibular symphysis and parasymphysis fractures has evolved from rigid fixation to semi-rigid fixation with miniplate osteosynthesis. Various miniplate systems have been developed in recent years including three-dimensional miniplate, microplates and bioresorbable plate, and their advantages and disadvantages have been compared and studied. To overcome the shortcomings of 3D plating system such as difficulty in adaptation and fixation in fractures involving the mental nerve, a novel Z plate has been designed by our institute.
Material And Methodology:
An in vitro study was performed to evaluate the biomechanical behaviour of the newly designed Z plate with 3D plate and two-miniplate system using finite element analysis.
Results:
Our study showed total structural deformation of 0.17 mm and 0.31 mm of newly designed Z plate after canine loading and molar loading, respectively. The equivalent von Mises force for plate after canine loading had shown the following results-Z plate showed values of 121.3 MPa and 58.40 MPa after molar loading.
Conclusion:
Our study concluded that the Z plate produces lowest stresses, lesser total structural deformation, superior stability and support in comparison with the 3D plate and two-miniplate system.
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